Device for securing pulleys to shafts



(No Model.)

' J. W. STAN TON. DEVICE FOR SEGURING PULLEYS T0 SHAPTS. No. 443,121. Patent-ed 1360.23, 18910.

' Fig. 2.

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UNITED STATES PATENT OFFICE.

JOHN XV. STANTON, OF` BELDING, MICHIGAN.

DEVICE FOR SECURI'NG PULLEYS TO SHAFTS.

SPECIFICATION forming part of Letters Patent No. .443,121, dated December 23, 1890.y

Application tiled July 1, 1890. Serial No. 357,336. (No model.)

To @ZZ whom t may concern:

Be it known that I, JOHN W. STANTON, a citizen of the United States, residing at Belding, in the county of Ionia and State of Michigan, have invented certain new and useful Improvements in Devices for Securing Pulleys on Shafts g andI do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

My invention relates to improvements in pulleys, and has especial reference to what may be properly termed an automatic clutch-pulley.

My invention relates to improvements in pulleys and devices for securing the same on shafts; and the object of the invention is the provision of simple, inexpensive, and efliciont devices of this character.

The invention further consists of a pulley having an eccentric groove, a pin or stud arranged in said groove and adapted to engage a notch or recess in the shaft, and a clutch working in conjunction therewith.

The invention further consists in the novel construction of parts, substantially as herein illustrated, described, and particularly deiined by the claims.

Figure 1 represents a vertical section of a pulley embodying my invention in position on the shaft with the clutching devices out of engagement with the shaft. Fig. 2 represents a similar View with the clutching devices engaging the shaft to retain the pulley thereon. Fig. 3 represents a transverse vertical sectional view of the pulley. Fig. .tropresents a vertical section of another form of my improved pulley.

My improved automatic pulley consists of the pulley proper A, provided with the eccentric or cam groove B, the socket or seat D, in which the clutch-pin'E normally rests, and the plate F, having the points, barbs, or teeth G, which form the clutch. -The plate F is of arc shape or segment form,in order that 1t may rest in the groove, is provided with an opening to receive t-he clutch-pin, and the` barbs or points thereon are preferably coldchisel points.

I provide the shaft Il with an indentation or notch J, and when it is desired to fit the pulley to the shaft the pulley is slipped on the shaft, the point of the clutch -pin is dropped into the indentation or recess of the shaft, and the pulley is turned, bringing the clutch and clutch-pin in the narrow portion 0f the groove, and thus securing the clutchpin in place in the indentation of the shaft and forcing the teeth or points of the clutch against the shaft, clearly shown, thus securely locking the pulley in place on the shaft, and the teeth will necessarily bite more rmly against the shaft as the strain thereon increases.

In the pulley shown in Fig. i I employ merely a clutch F, having one tooth G, which is the more simple, durable, and inexpensive construction.

It will thus be seen that I provide a pulley which comprises but three parts, rendering the same very strong, durable, and cheap; that it is impossible for the pulley to work loose on the shaft, and that it is automaticin 

